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SignalHarness Bitcoin Fee Calculator
x402
SignalHarness Bitcoin Fee Calculator is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-16).
Calculates Bitcoin transaction fees based on caller-supplied request parameters
Price / call$0.01
Success—
StatusUnknown
How this service works
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Output
Returns a JSON object containing the bitcoin_fee_calculation result string, any warnings about the estimate, the evidence_scope indicating the data source, plus a full receipt with payment ID, request ID, execution ID, latency, and a SHA-256 hash of the result for verification.
Example use cases
Estimating fee before sending BTC
“I'm about to send 0.05 BTC to a friend — can you calculate what the transaction fee will be so I know how much to include?”
Comparing fee tiers for confirmation speed
“What's the Bitcoin fee I should expect for a standard transaction right now? I want to know if there are any warnings about the current network conditions.”
Agent wallet management fee check
“Before my agent executes this bitcoin payment, calculate the appropriate transaction fee for a typical on-chain BTC transfer and flag any warnings.”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/bitcoin_fee_calculate/invokeWhen to prefer
Choose this endpoint when an AI agent or application needs a quick, on-demand Bitcoin transaction fee calculation as part of a payment workflow or financial analysis. It is well-suited for pre-payment fee checks, wallet integrations, and agent-driven Bitcoin transactions. At $0.01 USDC per call via x402, it is cost-effective for per-transaction fee lookups. Prefer this over manual mempool queries when you need a structured, receipt-backed response with warnings included.
Side effects
- Malformed or too-short bitcoin_fee_request string returns validation error
- Request string exceeds 65536 character limit
- Payment failure via x402 protocol results in no computation
- Ambiguous or under-specified fee request may return warnings or low-confidence calculation
- Network or service downtime returns error status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| bitcoin_fee_request | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"warnings": [
"Input values must be complete and are trusted as supplied."
],
"service_id": "bitcoin_fee_calculate",
"evidence_scope": "caller_supplied_data",
"bitcoin_fee_calculation": "{\"fee_rate_sat_per_vbyte\":\"16.39344262\",\"fee_sats\":\"1000\",\"input_total_sats\":\"2000\",\"output_total_sats\":\"1000\",\"virtual_size\":61}"
},
"status": "succeeded",
"receipt": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"usage": [],
"status": "succeeded",
"network": "eip155:8453",
"artifacts": [],
"endedAtMs": 0,
"latencyMs": 0,
"paymentId": "example-payment",
"receiptId": "example-receipt",
"requestId": "example-request",
"serviceId": "bitcoin_fee_calculate",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "10000",
"resultSha256": "5affa44dca5de6ead04723a7c60e0fac4afb5ad1553e8361ca4e17b969d11860",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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